William w



(No Model.)

W. W. ST. JOHN.

PACKING RING FOR PISTONS.

No. 355,730. .Ijzy. 5. 0% d WZZzazn 77. 252. 70702 NIT-ED STATES PATENT QFFIQE.

WILLIAM W. ST. JOHN, .013 BROOKLYN, NEW YORK.

PACKING-RING FOR PISTONS.

SPECIFICATION forming part of Letters Patent No. 355,730, dated January 11, 1887.

Application filed July 23, 1885. Renewed October 29, 1886. Serial No. 217,520. (No model.)

To all whom it may concern.-

Be it known that 1, WILLIAM W. Sr. J OHN, a citizen of the United States, residing at Brooklyn ,'in the county of Kings and State of New York,have invented certain new and use.- ful Improvements in Packing-Rings for I istons; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. 1

My invention relates to improvements in packing-rings for pistons of engines, pumps, &c., and the object is to produce a packingring that can be easily applied to solid pistons, especially in an easy and covenient manner; also, to produce these rings as an article of manufacture, so that .they can be kept on hand and on sale in'the market, to be applied to different kinds of pistons; also, by a packingjoint in the ring to prevent leakage of steam, and thereby to increase the efficiencyof the machine, engine, or pump, and, furthermore, to produce these rings at a very low cost and in a very simple manner.

The invention consists in the construction and arrangement of parts and details, as will be more fully described hereinafter, and more specifically described in the claims, reference. being had to the accompanying drawings andv the letters of reference marked thereon.

Like letters indicate similar parts in the different figures of the drawings, in which- Figure 1 represents a side view of my improved packing-ring for pistons. Fig. 2 is a cross-section on linem a; of Fig. 1. Fig. 3 is a detail view of the "filling-piece. Fig. 4 is a,

detail perspective view of the ends of the ring. Fig. 5 is a detail perspective view of the filling-piece. Fig. 6 is a section of a modified form of joint. Fig. 7 is a'section of a piston with the rings in place. 4

In the drawings, A represents the packingring, made of the cross-section shown in Fig. 2, and the vertical part or side, a, thereof is made deeper than the face I), so that the steam against it will tend to set the ring out against the interior of the cylinder. This ring is cut at one side and a filling-piece, B, of peculiar construction is fitted into recesses 6. This filling-piece has the ends c c, which fit snugly into the said recesses e, and a T-piece, d,which fits into a recess at theupper side of the ring, and the joint is thus securelyclosed by the filling-piece, at the same time allowing the ring freely to expand and contract. The recesses e are formed by a milling-tool, and can i I ton' in this instance is merely turned outat the I edges, and the rings are sprung in place, being then free to expand and 'form a perfect packing against the cylinder. The filling-piece is in thiscase of the same construction as in the other cases, and applied in a similar manner to prevent leakage.

It will be readily seen by those skilled in the art that this packing-ring can be easily applied to the pistons of engines, pumps, &c.,

in which especially solid pistons are employed;

that they can be readily applied to old as well, as new pistons with very'little trouble and at a very small expense; that it will obviate any leakage of steam, as the steam will pass against it as well as under it, and expand it against the interior face of the cylinder in a uniform manner without permitting any leakage whatever. It can be produced and kept on'hand in shops or stores as an article of manufacture, and can be ordered according to the size required, being enumerated according to the diameter of the cylinder of the engine, forming thus a commodity to the public. In case ofbreakage item be readily removed and replaced by a new one at very small cost and without any inconvenience. It does not'require careful fitting, as ordinary rings do, but can be applied by any ordinary mechanic.

Having thus described my invention,what I claim, and desire to secure by Letters Patent,

1. The combination of a piston-head with a split ring, A, of the cross-section shown, and

having a filling-piece, B, provided with ends 0 c and central part, (I, and fitting into correspondingly'shaped recesses in the adjoining packing-ring, all arranged as shown and herein ends of the ring, as and for the purpose speeispecified. ,IO ,fied. In testimony whereof I hereby aifix my sig- 2. As a new article of manufacture, a split nature in presence=0f two witnesses. 5 packing-ring 0f the cross-section shown, and WM. V. ST. JOHN. provided with a filling-piece having ends and WVitnesses:

a central part fitting into correspondingly-' T. G. BREOHT,

. shaped recesses in the adjoining'ends of said LOUIS BEYER. 

